By default MDAC is installed in XP. I thought that you somehow removed it.
Please do the following:
In Windows press Start button.
Click on Control Panel.
Click on Administrative Tools.
Click on "Data Sources (ODBC)"
Go to Drivers tab.
Verify that in list of drivers you have:
"Microsoft Access Driver (*.mdb)"
There are other language translations of the text.
But verify that this English text is present in the list of drivers.
If it's possible send to support@abacre.com screenshot of this Drivers tab.